In Kamen Rider Zi-O, he returns as King Kuroto Dan, the founder of the Dan Corporation who will become Another OOO after the Time Jackers noticed his lust for power. His goal is for his company to become its own nation. He will turn those people that he didn't like into Yummies, the monsters that appear in Kamen Rider OOO.
He will appear in Kamen Rider Zi-O's 9th and 10th episode, the Kamen Rider OOO story arc.
[Source: Tokusatsu Network, SpecialForm12]